A proforma invoice is a preliminary bill sent by a seller to a buyer before a sale is finalized. It is not a demand for payment. It is not legally binding. Think of it as a formal preview of what the final invoice will look like — sent early so both parties can agree on the terms before anything ships or gets delivered.

If you have ever imported goods, exported products, or worked with large corporate clients, you have almost certainly received or issued one. Yet most business owners still confuse it with a quotation, a purchase order, or even a tax invoice. This guide clears all of that up — and shows you exactly when and how to use one.

What Is a Proforma Invoice?

A proforma invoice is a document issued by a seller that outlines the estimated cost, quantity, description, and terms of goods or services before the transaction is complete.

What it is:

• A formal price commitment in invoice format
• A pre-sale agreement document
• A tool for customs, financing, and internal approvals

What it is not:

• A legally binding payment demand
• A tax invoice (you cannot claim GST/VAT input credit on it)
• A replacement for a commercial invoice at customs

The word "proforma" comes from Latin and means "as a matter of form." That captures it well — it follows the form of an invoice but carries none of the legal weight of a final bill.

Why Do Businesses Use a Proforma Invoice?

There are four main reasons a seller sends a proforma invoice:

1. International Trade and Customs

Customs authorities in most countries need documentation before a shipment arrives. A proforma invoice gives border officials the product descriptions, quantities, values, and country of origin they need to estimate import duties and begin pre-clearance paperwork — even before the actual goods leave port.

2. Letters of Credit (LC)

When a buyer needs bank financing to complete a large purchase, the bank requires a document that spells out the exact transaction value and terms. A proforma invoice is the document banks use to open a Letter of Credit (LC). Without it, the buyer simply cannot start the LC process. The Reserve Bank of India's FEMA guidelines govern how such documents are treated in cross-border transactions.

3. Internal Purchase Approvals

Government agencies, large corporations, and institutions often require a formal document before approving a purchase order. A proforma invoice gives procurement teams and finance departments the numbers they need to get sign-off before committing to the deal.

4. Advance Payments

When a seller needs upfront payment before starting production or shipping, they send a proforma invoice requesting the advance. It serves as the formal basis for that payment — not a tax invoice, but a clear record of what was agreed.

Proforma Invoice vs. Commercial Invoice — Key Differences

This is the most searched comparison for good reason. The two documents look almost identical. Here is exactly how they differ:

The simple rule: Proforma comes first, commercial invoice comes last.

Proforma Invoice vs. Quotation vs. Purchase Order

Three documents, three very different roles. Here is how they fit in the sales process:

Quotation — The seller's initial offer. Informal, often just a price list or email. No standard format required.

Proforma Invoice — The seller's formal offer, presented in invoice format. More detailed than a quotation. Used once there is serious intent to buy.

Purchase Order (PO) — The buyer's formal confirmation. It says: "We accept your terms, we want this quantity, ship it."

The typical sequence looks like this:

Buyer inquiry → Quotation → Proforma Invoice → Purchase Order → Delivery → Commercial Invoice → Payment

What Must a Proforma Invoice Include?

A proforma invoice that is missing key fields will cause delays at customs, problems with banks, or disputes with buyers. Every proforma invoice must include:

Mandatory Fields

Header

• The words "PROFORMA INVOICE" clearly at the top (not just "Invoice")
• A unique proforma number (e.g., PI-2026-001)
• Date of issue
• Validity period (e.g., "This proforma is valid for 30 days from the date above")

Seller Details

• Legal business name (exactly as registered)
• Full address
• GSTIN / Tax ID / VAT number (where applicable)
• Contact email and phone
• Bank details (if requesting advance payment)

Buyer Details

• Buyer's full legal name
• Complete shipping and billing address
• Contact person name and email

Line Items

• Detailed description of each product or service
• HSN / SAC code (mandatory in India under GST)
• Quantity and unit of measurement
• Unit price
• Total price per line item
• Currency (INR, USD, EUR — always specify)

Financials

• Subtotal
• Applicable taxes (GST breakdown: CGST/SGST/IGST, or VAT for international)
• Shipping and freight charges
• Discounts (if any)
• Grand Total

Terms

• Payment terms (e.g., 30% advance, 70% before dispatch)
• Incoterms for exports (FOB, CIF, EXW, etc.)
• Estimated delivery date
• Place of delivery

Disclaimer

• "This is a Proforma Invoice and not a Tax Invoice. It carries no legal or tax validity."

Proforma Invoice Format — Example Layout

Here is what a properly structured proforma invoice looks like:

How to Create a Proforma Invoice — Step by Step

Step 1: Choose Your Template

Start with a pre-built template. Download the free Excel or PDF template linked at the end of this article. It includes GST fields, HSN code columns, and automatic totals.

Step 2: Add Seller and Buyer Details

Fill in your legal business name exactly as it appears on your PAN or GST registration. For the buyer, include their full address with the country — especially important for export transactions.

Step 3: Assign a Unique Proforma Number

Use a consistent numbering system: PI-2026-001, PI-2026-002, and so on. This makes tracking and follow-up far easier.

Step 4: List All Line Items Clearly

Describe each product or service specifically — not generically. "Handmade cotton rugs, 3x5 ft, red and blue pattern" is correct. "Rugs" is not. Vague descriptions cause customs delays.

Step 5: Include HSN / SAC Codes

In India, every product under GST has an HSN code and every service has a SAC code. Include these for every line item. They are mandatory in commercial invoices and strongly recommended in proforma invoices.

Step 6: Calculate Taxes and Total

Add GST breakdown (CGST + SGST for domestic, IGST for interstate or export). If you are exporting under LUT (zero-rated supply), state: "Export under LUT — Zero-rated supply. No GST applicable."

Step 7: Add Payment Terms and Validity

Never leave these out. State the exact payment split, accepted payment methods, and how many days the proforma is valid.

Step 8: Add the Disclaimer

"This document is a Proforma Invoice and not a Tax Invoice. It has no legal or tax validity and does not represent a demand for payment."

Step 9: Sign and Send as PDF

Have an authorized signatory sign it. Add your company stamp if applicable. Always send as a locked PDF — not an editable Word file.

Proforma Invoice Under GST in India

This is the section most Indian businesses need to read carefully.

Key rules under Indian GST:

• A proforma invoice is not a tax document. You cannot use it to claim GST input tax credit.
• It is not required to be reported in your GST returns (GSTR-1, GSTR-3B, etc.)
• Receiving a proforma invoice does not create a GST liability for the buyer
• It is not a substitute for a tax invoice when goods or services are actually supplied

When GST may still matter on a proforma: If a buyer pays an advance based on a proforma invoice, GST may apply to that advance (under Section 12/13 of the CGST Act, depending on the nature of supply). In that case, you should issue a proper Receipt Voucher for the advance payment — not treat the proforma as a tax document.

For Indian exporters: Proforma invoices are considered the first official document in the export trade process. When a foreign buyer accepts the proforma, it is used to:

• Open a Letter of Credit with their bank
• Apply for import permits in their country
• Prepare customs and shipping documents
• Align with DGFT (Directorate General of Foreign Trade) requirements

Common Mistakes That Kill Deals and Cause Customs Delays

Mistake 1: Writing "Invoice" instead of "Proforma Invoice" This single error can create legal confusion. A buyer may treat it as a payment demand. A customs officer may treat it as a commercial invoice. Always clearly label it.

Mistake 2: No validity period Without a validity date, a buyer can come back six months later expecting the same price. Add "Valid for 30 days" on every proforma.

Mistake 3: Vague product descriptions "Electronics" or "Goods" will get flagged at customs. Use full product names, specifications, HSN codes, and country of origin.

Mistake 4: Proforma and commercial invoice don't match If your proforma says 200 units at $45 and your commercial invoice says 200 units at $46, the bank may reject the LC payment. Keep them consistent.

Mistake 5: Missing Incoterms on export proformas FOB? CIF? EXW? If you don't specify who pays for freight and insurance, you will have a dispute when the bill arrives. Check the official ICC Incoterms guide for definitions.

Mistake 6: Using it as a tax invoice A proforma cannot replace a tax invoice for GST compliance. Once the supply happens, issue a proper tax invoice.

When Should You Send a Proforma Invoice?

Send a proforma invoice when:

• A buyer asks for a formal price quote in invoice format
• A buyer needs to apply for an import license
• A buyer's bank requires documentation to open a Letter of Credit
• You need advance payment before starting production or shipping
• A government client or large company needs internal purchase approval
• Customs authorities need pre-shipment valuation

Do not send a proforma invoice when:

• The sale is complete and goods have already been delivered (send a tax invoice instead)
• You want to record the sale in your accounts (use a commercial invoice)
• The buyer needs a document for GST input credit (use a tax invoice)

Free Proforma Invoice Template — Download

???? Download Proforma Invoice Template — Excel (GST-ready with HSN fields)

The templates include:

• Pre-filled GST calculation formulas
• HSN / SAC code column
• CGST / SGST / IGST split
• "PROFORMA INVOICE" watermark / disclaimer
• Export-ready Incoterms field
• Validity date reminder

Frequently Asked Questions

What is a proforma invoice used for?
A proforma invoice is used to give buyers a formal preview of a transaction before it is completed. Common uses include opening letters of credit with banks, applying for import licenses, getting internal purchase approvals, and securing advance payments from buyers.

Is a proforma invoice legally binding?
No. A proforma invoice is not legally binding. It does not create a legal obligation to pay. Once both parties formally accept the proforma and goods or services are delivered, a commercial or tax invoice is issued — and that is the legally binding document.

What is the difference between a proforma invoice and a commercial invoice?
A proforma invoice is issued before the sale is finalized. A commercial invoice is issued after goods are shipped or services are delivered. The commercial invoice is legally binding and demands payment. The proforma invoice is an advance estimate — not a demand for payment and not recorded in accounts.

What is the difference between a proforma invoice and a quotation?
A quotation is an informal price estimate. A proforma invoice is a formal document in invoice format. The proforma is more detailed, follows a standard format, and is used in formal trade processes like LC applications and customs documentation. A quotation is usually just the starting point of a negotiation.

Does GST apply on a proforma invoice in India?
No. Under Indian GST law, a proforma invoice is not a taxable document. It cannot be used to claim input tax credit and does not need to be reported in GST returns. GST applies only when the actual supply of goods or services takes place and a proper tax invoice is issued.

Can I collect advance payment against a proforma invoice?
Yes, you can request advance payment using a proforma invoice. However, once advance payment is received, GST may apply on that advance (depending on the nature of supply). In such cases, also issue a Receipt Voucher for the advance and convert the proforma into a proper tax invoice when supply happens.

What comes first — a PO or a proforma invoice?
The proforma invoice comes first. You send it to the buyer after initial negotiations. The buyer then reviews it, gets internal approvals, and issues a Purchase Order (PO) as their formal confirmation. Then you proceed with supply.

Is a proforma invoice mandatory for exports from India?
It is not legally mandatory under FEMA or DGFT rules, but it is practically essential. Foreign buyers need it to arrange Letters of Credit, import permits, and customs documentation. Most Indian exporters treat it as the first step in every export transaction.

How long is a proforma invoice valid?
Typically 30 days, but you can set any validity period. Always state the validity clearly on the document. After it expires, issue a revised proforma if prices or terms have changed.

How do I number proforma invoices?
Use a consistent prefix and sequence — for example, PI-2026-001, PI-2026-002. Use a different prefix from your regular invoices (e.g., INV- for tax invoices, PI- for proforma) to avoid confusion.

Summary

A proforma invoice is one of the most practical documents in business — especially for anyone dealing with exports, imports, large clients, or advance payments. It builds trust by making terms clear before anything is committed. It speeds up customs, enables financing, and prevents disputes.

Here is what to remember:

• Issue it before the sale, not after
• Label it clearly as "Proforma Invoice" — not just "Invoice"
• Include HSN codes, currency, Incoterms, validity, and a disclaimer
• Never use it as a substitute for a tax invoice
• Make sure your proforma and final commercial invoice match exactly

Download the free template above, adapt it to your business, and use it every time you start a new deal — domestic or international.